TREA

Smith; Telford L.

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  • Watsonville, CA, US
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Patents Grantslast 30 patents

  • Information Patent Grant

    Back flow preventer valve
    • Patent number 4,159,025
    • Issue date Jun 26, 1979
    • Smith; Telford L.
    • Norman E. Harthun
    • E03 - WATER SUPPLY SEWERAGE